Murray Rothbard : (3) " Keynes eliminated economic theory’s ancient role as spoilsport for inflationist and statist schemes, leading a new generation of economists on to academic power and to political pelf and privilege. " - Murray Rothbard " Positivism eliminates any kind of natural law principle – for example, that there are economic laws which can be transgressed only at your peril. With positivism, there is a tendency to leap into ad hoc economic theory. " - Murray Rothbard " Praxeology – economics – provides no ultimate ethical judgments: it simply furnishes the indispensable data necessary to make such judgments. " - Murray Rothbard